Long hood retrieval device

Abstract

An endoscope hood device for moving a gastrointestinal implant device within a natural lumen of a gastrointestinal tract. The endoscope hood device comprises an atraumatic flared retrieval hood configured to attach to and fit over a distal end of an endoscope. The atraumatic flared retrieval hood comprises a length configured to cover a plurality of protrusions on a surface of the gastrointestinal implant device, the plurality of protrusions comprising both proximal facing protrusions and distal facing protrusions of the gastrointestinal implant device. The atraumatic flared retrieval hood comprises a diameter configured to fit within a human esophagus without damage to the esophagus, and comprises a material of a bend radius configured to move slidably against the esophagus without damage to the esophagus.

What is claimed is: 
     
         1 . An endoscope hood device for moving a gastrointestinal implant device within a natural lumen of a gastrointestinal tract, the endoscope hood device comprising:
 a collapsible, atraumatic flared retrieval hood configured to attach to and fit over a distal end of an endoscope;   the atraumatic flared retrieval hood comprising a length of between about 18 mm and about 36 mm from the distal end of the endoscope to a distal end of the atraumatic flared retrieval hood;   the atraumatic flared retrieval hood comprising a largest diameter of between about 10 mm and about 20 mm;   the atraumatic flared retrieval hood comprising a material of a durometer between about Shore 70 A and about Shore 95 A; and   the atraumatic flared retrieval hood comprising a material of a bend radius of at least about 0.055 inches, the bend radius being measured at a bend of the atraumatic flared retrieval hood when the atraumatic flared retrieval hood is in a flattened configuration.   
     
     
         2 . The endoscope hood device of  claim 1 , wherein the bend radius of the atraumatic flared retrieval hood is at least about 0.060 inches. 
     
     
         3 . The endoscope hood device of  claim 1 , wherein the bend radius is measured at a distal tip of the atraumatic flared retrieval hood. 
     
     
         4 . The endoscope hood device of  claim 1 , wherein the atraumatic flared retrieval hood comprises at least one of a urethane, an elastomer, and a silicone. 
     
     
         5 . The endoscope hood device of  claim 1 , wherein the atraumatic flared retrieval hood comprises a transparent urethane. 
     
     
         6 . A retrieval device comprising an endoscope hood device for moving a gastrointestinal implant device within a natural lumen of a gastrointestinal tract, the endoscope hood device comprising:
 (i) a collapsible, atraumatic flared retrieval hood configured to attach to and fit over a distal end of an endoscope;   (ii) the atraumatic flared retrieval hood comprising a length of between about 18 mm and about 36 mm from the distal end of the endoscope to a distal end of the atraumatic flared retrieval hood;   (iii) the atraumatic flared retrieval hood comprising a largest diameter of between about 10 mm and about 20 mm;   (iv) the atraumatic flared retrieval hood comprising a material of a durometer between about Shore 70 A and about Shore 95 A; and   (v) the atraumatic flared retrieval hood comprising a material of a bend radius of at least about 0.055 inches, the bend radius being measured at a bend of the atraumatic flared retrieval hood when the atraumatic flared retrieval hood is in a flattened configuration;   the retrieval device further comprising the endoscope, the endoscope defining a lumen and providing an outer tube of the retrieval device.   
     
     
         7 . The retrieval device of  claim 6 , further comprising an inner tube defining a lumen and adapted for insertion into the endoscope;
 an elongated member having a proximal end and a distal end, the elongated member slidably disposed within the lumen of the inner tube;   a grasper disposed at the distal end of the elongated member, adapted to engage the gastrointestinal implant device to collapse at least a portion of the gastrointestinal implant device when operated.   
     
     
         8 . The retrieval device of  claim 6 , further comprising the gastrointestinal implant device, wherein the gastrointestinal implant device comprises:
 a flexible, floppy sleeve, open at both ends, to extend into the duodenum;   a collapsible anchor coupled to a proximal portion of the sleeve; and   a drawstring threaded through a proximal end of the anchor and drawn into the inner tube by the grasper;   at least a proximal portion of the anchor being captured within the retrieval hood such that the retrieval hood covers a plurality of protrusions on a surface of the gastrointestinal implant device, the plurality of protrusions comprising both proximal facing protrusions and distal facing protrusions of the gastrointestinal implant device.   
     
     
         9 . The retrieval device of  claim 6 , wherein the plurality of protrusions comprise a plurality of muscle-penetrating barbs.